Hajime Imura, Hiroshige Murata, Masami Ochi
Department of Cardiology, Nippon Medical School Hospital, Tokyo, Japan.
Department of Cardiovascular Surgery, Nippon Medical School Hospital, Tokyo, Japan.
DOI: 10.4236/ss.2013.412105   PDF    HTML     3,601 Downloads   4,874 Views   Citations

Abstract

Membranous septal aneurysm (MSA) is a rare anomaly and known to cause ventricular tachycardia and atrioventricular block. However, underlying mechanisms have not been addressed in its long history. We report first 3-D electro-anatomical mapping of MSA during and three years following the surgery. An elderly patient underwent a surgery for MSA. In the mapping, we located the His bundle near MSA and observed delayed potentials around MSA. Our report showed that electrophysiological character of myocardium was changed around MSA and this change might be a reason for ventricular tachycardia and atrioventricular block. An ordinary surgery for MSA might not resolve this problem since we still observed delayed potentials three years after the surgery.

Keywords

Membranous Septal Aneurysm; Electro-Anatomical Mapping; Ventricular Tachycardia; Atrioventricular Block

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Conflicts of Interest

The authors declare no conflicts of interest.

References

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